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- W2945595008 abstract "The recently discovered Fe-based superconductor (FeBS) ${mathrm{LaFe}}_{2}{mathrm{As}}_{2}$ seems to break away from an established pattern that doping an FeBS beyond $0.2e/mathrm{Fe}$ destroys superconductivity. ${mathrm{LaFe}}_{2}{mathrm{As}}_{2}$ has an apparent doping of $0.5e$, yet superconducts at 12.1 K. Its Fermi surface bears no visual resemblance with the canonical FeBS fermiology. It also exhibits two phases, none magnetic and only one superconducting. We show that the difference between them nonetheless has a magnetic origin, the one featuring disordered moments, and the other locally nonmagnetic. We find that La there assumes an unusual valence of $+2.6$ to $+2.7$, so that the effective doping is reduced to $0.30ensuremath{-}0.35e$. A closer look reveals the same key elements: hole Fermi surfaces near $mathrm{ensuremath{Gamma}}ensuremath{-}Z$ and electron ones near the $Xensuremath{-}P$ lines, with the corresponding peak in susceptibility, and a strong tendency to stripe magnetism. The physics of ${mathrm{LaFe}}_{2}{mathrm{As}}_{2}$ is thus more similar to the FeBS paradigm than hitherto appreciated." @default.
- W2945595008 created "2019-05-29" @default.
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- W2945595008 date "2019-12-31" @default.
- W2945595008 modified "2023-09-23" @default.
- W2945595008 title "Novel Fe-Based Superconductor <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi>LaFe</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi>As</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math> in Comparison with Traditional Pnictides" @default.
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- W2945595008 doi "https://doi.org/10.1103/physrevlett.123.267001" @default.
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